IIRC, Catholic opposition to "vernacular" Bibles had to do with the ongoing "Protestant vs. Catholic" outlook on the world - translations, which books were included, etc. At the same time there was a strong Protestant motion for Bibles (and services) in any language *but* Latin, because that was a Catholic thing. Those who were educated back then - in the tradition of the "classical" education - knew Latin and Ancient Greek - had their choice of reading in translated or "original" languages.